Overuse of gel can definitely weigh hair down, but unless you are using way more than you did pre-haircut, I'm thinking that this isn't your problem.

I'm seeing two possibilities here for what is going on. First, you might need to try a light protein treatment. I see that the gelatin one didn't work for you, but that's quite a strong treatment. Maybe try a conditioner with just a moderate amount of protein in it, such as Aubrey GPB or Cure Care.

The other possibility is that your hair is just freaking out over the cut. This is quite normal, and it should look much better in a week or so. I had a lot of layers added to my hair about a month ago, and my hair completely freaked and looked horrible for about a week, but now I love it!

Hopefully others will chime in with more suggestions. Good luck!
Medium/coarse, low porosity, dense, mix of 3s
CG (again) since Nov. 2012

Cleanse: SM Moisture Retention, Elucence MBC, KC Come Clean
Condish: Giovanni DL, Cure Care, Ion Treatment, GVP Balm, AOHR
Stylers: KCCC, SM Souffle, AOMM, SS CEJ, JCRR, JCCC

Trying out steaming!